The Labour government is on a mission to grow the economy to pay for all the public expenditure needed. But where will this growth come from? Previous major economic growth (e.g. in Germany, Japan and China) has had two common factors: exports and high levels of domestic savings. Labour’s plans don’t include anything about exports or export growth, and savings net of capital depreciation are less than zero in the UK.

How does Labour’s strategy of building new houses and wind turbines, and fitting lots of solar panels, cause economic growth? The need for more houses comes from the sharp growth in the UK population, and with higher population, GDP growth itself doesn’t necessarily raise GPD per head. On the wind turbines and solar panels, we’re replacing one capital stock (gas and coal power stations) with another (off- and onshore wind and solar panels) that provides exactly the same services. As new technology replaces old assets, this is capital maintenance not investment.

The stuff to build the houses, turbines and panels comes from overseas supply chains – the opposite of export-led growth. The economic growth calculation is based on the assumption that the costs of renewables will fall. But with the net zero card being pushed elsewhere, the costs are higher for all those competing countries wanting to go faster.

The main source of finance is overseas debt markets. This dash for growth is in effect a dash for debt. The cost of capital is key to this, and it’s been rising in real terms. How will the government get to a position of no current deficit and debt falling as a percentage of GDP by the end of the Parliament? Calling anything investment, especially capital maintenance, is no real, long-term solution. If the government’s strategy goes wrong, the dash for debt will leave finances even worse than it inherited. Let’s be realistic about what we are truly facing.